The experiment shows that the PIV technique can be utilized to measure the unsteady complex flow of passive vibration, and analyses the vortex-induced vibration.
试验证明了PIV技术可以应用于被动振动非定常复杂流场的测量中，并对两维翼流体旋涡诱发振动响应进行了分析。
This type of flow has not only complex flow separation, but the character of unsteady bringing noise.
这类流动不仅具有复杂的流动分离结构，而且常常不稳定，也是噪声发生的主要区域。
Therefore, developing scientific visualization methods for observing and studying unsteady structures in these complex flow fields has a significant and practical meaning.
因此，探索用科学计算可视化的手段，观察和研究这类复杂流场中的不稳定结构就具有重要和现实的意义。
The new method is used to study transonic flow in cascades and one kind of complex unsteady transonic axisymmetric flow in arc breaker.
利用本文的方法，分别计算了跨声速叶栅流动和工程中一类复杂非定常轴对称跨声速流动。
The Xunjiang River is divided into three parts by Sihuazhou Island and Changzhou Island in Changzhou Hydraulic Complex, and the flow will become unsteady when anyone of them is closed.
长洲水利枢纽坝址区的两个江心岛泗化洲岛和长洲岛将浔江隔成三江，对任何一江截流，其他两江的流量过程均是非恒定的。
Turbulence is an extraordinarily complex three-dimensional flow which is unsteady, inerratic and composed of eddies.
湍流是一种高度复杂的三维非稳态、带旋转的不规则流动。
The unsteady free water sheet flow in the rotating bucket of a Pelton turbine is a very complex flow that cannot be accurately simulated for lack of a numerical method.
冲击式水轮机水斗内非定常自由水膜的流动非常复杂，至今还没有足够精确的数值方法来模拟这种流动。
The unsteady free water sheet flow in the rotating bucket of a Pelton turbine is a very complex flow that cannot be accurately simulated for lack of a numerical method.
冲击式水轮机水斗内非定常自由水膜的流动非常复杂，至今还没有足够精确的数值方法来模拟这种流动。
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